MOH connections 1

[armona]

I need to connect a speaker wire to our MOH.
I know the location of the attachments but I can not get the music to play correctly. The music sounds like a broken speaker.
I was told that the signal is too strong.
How do I reduce signal strengh?
My speaker wire is comming from a Sony system with 100W 8 ohms per channel.

 

[Billxx]

It sounds like you may be overdriving the Vodavi system. Try adding an Impedance Matching Transformer and a Potentiometer to control the Impedance and the Level going to the Vodavi. The transformer should be 8 ohms on one side and 600 ohms on the other. The potentiometer should be around 1000 ohms.

 

[armona]

Bill can you please elaborate on these two items.
ie where can I get them (Fry's?), and how do i connect them
thanks

 

[Billxx]

I don't know where Fry's is. You can go to Radio Shack (although I don't like to send anyone there) and pick up the 2 parts there. I put up a little free-site with a diagram for you. It is a little bit rough drawn, but the idea is there. Try going to

http://www.geocities.com/kxt_help

 

[armona]

Bill I ordered the RS 273-1374 and RS 271-1714 form Radio Shak.
The RS 273-1374 was named "1:1 Isolation Transformer" and not as you called it "impedance matching trasnformer." I did not see a level control on it, but I do see a level control on the Potentiometer. I hope this items would still work
Also I am not sure as of the order of the connections to the Potentioimeter. I see it has three connections. How do I connect two wires from the impedence matching trasformer and two wires from the phone system to a three connections potentiometer.

 

[armona]

I got the items as described and attempted to connect them in every possible option. I could not get the MOH to work on a cell phone line, the music is blurry.
I also found that I dont really need all the connections to hear the music on a regular line, but the volume is very low.
ANY SUGGESTION ON HOW TO INCREASE THE VOLUME AND HOW TO ALLOW CELL PHONES TO CONNECT CORRECTLY TO MOH?

 

[Billxx]

OK... Connecting the components correctly is important for proper operation. There is a schematic on the help website. If you aren't familiar with schematics here is a text discription of what to do. On the Potentiometer (volume control) there are 3 pins. Basically Left, Right and Center. On the Transformer there are 2 wires on each side. (if there are 3 wires, determin which two go to the ends of the winding). Connect two wires from the transformer (either side) to the Left and Right pins of the Potentiometer. Then connect the Center pin and Left pin of the potentiometer to the Music On Hold Input of the Vodavi KSU. Note: The Left pin of the Potentiometer will have 2 wires on it. Connect the other 2 wires of the transformer to the Music Source. Call a telephone number that is connected to your system (try not to use a cellphone) and place it on hold. Listen to the level and adjust it until it is correct. Give it a try.

 

[armona]

Bill I tried that and it does work. yet it works just the same with out these parts. The volume is low and the music is ok on all ground lines. On the other hand on cell phones it does not work appropriatley.
Any ideas why?

PS thank you for all the help

 

[Billxx]

OK... I'm not sure if you tried this but take the Potentiometer out of the picture. That is, just have the transformer connected to the Music Source on one side and the Vodavi to the other side. I'm sure you are connecting it to the Vodavi on the Violet Green Pair of wires, but double check it. There is no difference, as far as the Telephone System goes, when it comes to putting a call on hold from a cellphone or a regular land line. My personal experience however has been that digital cellphones will mutilate music and are not reliable for testing purposes.. If you connect a speaker directly to the wires going to the Vodavi, do you get an acceptable level and quality sound? Bill

 

[armona]

Bill I tried that and it did not work.
I found the solution I need to increase the signal strength. I found out that if I increase our office stereo system volume it will sound almost decent on the cell phone and it sounds great on a regular line phone.
Problem is that I can not keep the office music very loud.
Is there any way that I can increase signal strength on the extension wires that lead to the phone system?
Bill thanks for all the help

 

[Billxx]

No problem as far as the help goes.... Usually the problem is that the office sound is too loud for the telephone system. That is what the Potentiometer is there for. But you have a very much different situation. I have never needed to boost the signal going into the telephone system before. I've been in the business for 35 years now. However, there is always that unusual case. Here is a telephone number for a supplier of special "Problem Solving" solutions. He has a variety of special products that may help you. He is an old time telephone person and will understand your situation. Try calling Mike Sandman 630 980-7710. Speak with Mike himself if he is available. If there he has no solution then you may want to consider a seperate radio for the telephones or get a digital player with some information on hold about your company. Let me know how it works out.... Bill